Ink supply and cleaning system for ink spraying and printing head

Abstract

The invention provides an ink supply and cleaning system for an ink spraying and printing head, comprising a primary ink box, a secondary ink box and the ink spraying and printing head, wherein the primary ink box is communicated with a secondary ink box by virtue of a primary ink pump and a filter, the secondary ink box is internally provided with a liquid level sensor, the liquid level sensor is connected with a feedback control module, the feedback control module is connected with the primary ink pump, the secondary ink box is provided with a breather pipe communicated with the air, and a spray orifice of the ink spraying and printing head is higher than the highest liquid level of the secondary ink box; the bottom of the second ink box is provided with an auxiliary liquid outlet, the liquid outlet is connected with an auxiliary liquid outlet pipe, the auxiliary liquid outlet pipe is provided with an additional ink pump, an ink supply channel comprises an outlet pipe and an output pipe, the outlet pipe is provided with a solenoid valve, one end of the outlet pipe is communicated with the secondary ink box, the other end of the outlet pipe is communicated with one end of the output pipe, the other end of the output pipe is communicated with the ink spraying and printing head, the auxiliary liquid outlet pipe is communicated with the other end of the outlet pipe, and diameters of the auxiliary liquid outlet pipe and the outlet pipe are larger than the diameter of the output pipe. The ink supply and cleaning system disclosed by the invention can enhance reliability and has a good cleaning effect.

Description

technical field [0001] The invention relates to an ink supply system for an inkjet printing head. Background technique [0002] Inkjet printing is a process in which ink is ejected in the form of tiny ink droplets through an inkjet print head under the control of a computer and attached to paper and other media to form a specific pattern for information recording. [0003] There are many technical forms of inkjet printheads, but all kinds of printheads have certain requirements for the ink pressure during operation. When the ink pressure exceeds the allowable range, the print head will not work properly. [0004] Home and commercial printers use ink cartridges with a certain volume, and after the ink in them is consumed, the printing task needs to be stopped and the ink cartridges need to be replaced manually. This is not allowed in industrial production equipment. In large bill printers, digital printing machines and other equipment, a special continuous ink supply system...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the shortcomings of poor reliability and poor cleaning effect of the existing continuous ink supply system, the present invention provides an inkjet printing head ink supply and cleaning system with improved reliability and good cleaning effect

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